<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      section {
        height: 100vh;
      }

      .gImg {
        background-attachment: fixed;
        background-size: cover;
        background-position: center center;
        width: 100%;
      }

      .gImg1 {
        background-image: url(./assets/mac1.jpg);
      }

      .gImg2 {
        background-image: url(./assets/mac2.jpg);
      }

      .gImg3 {
        background-image: url(./assets/mac4.jpg);
      }
    </style>
  </head>
  <body>
    <section class="gImg gImg1">IMG1</section>
    <section class="gImg gImg2"}>IMG2</section>
    <!-- <section class="gImg gImg3"}>IMG3</section> -->
  </body>
</html>
